Face Door Hanger

I started freelancing from this month and have more time to work at home than before. My son, by the way, is 2 years old and can’t read yet, so he ignores a door hanger that says ‘Do Not Disturb’ in words. That’s why I came up with this concept. He understands what this face door hanger means, but there’s one problem: he got to like it so much that he cries out for it in front of the door of my room… So he’s disturbing me much more now. Oops!